@font-face {
  font-family: Poppins, sans-serif;
  src: url('./assets/fonts/Poppins-Italic.ttf') format(truetype);
  font-weight: 400;
  font-style: italic;
}

@font-face {
  font-family: Poppins, sans-serif;
  src: url('./assets/fonts/Poppins-bold.ttf') format(truetype);
  font-weight: 700;
}

@font-face {
  font-family: Poppins, sans-serif;
  src: url('./assets/fonts/Poppins-ExtraBoldItalic.ttf') format(truetype);
  font-weight: 800;
  font-style: italic;
}

@font-face {
  font-family: Poppins, sans-serif;
  src: url('./assets/fonts/Poppins-ExtraBold.ttf') format(truetype);
  font-weight: 900;
  font-style: italic;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  /* neutral */
  --White: hsl(0, 0%, 100%);
  --Off-black: hsl(0, 0%, 8%);
  --Off-white: hsl(0, 0%, 94%);
  --Light-grey: hsl(0, 0%, 86%);
  --Smokey-grey: hsl(0, 1%, 44%);

  /* primary */
  --Purple: hsl(259, 100%, 65%);
  --Light-red: hsl(0, 100%, 67%);

  /* fw */
  --fw-400: 400;
  --fw-700: 700;
  --fw-800: 800;

  font-family: Poppins, sans-serif;
}

label {
  color: var(--Smokey-grey);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.75rem;
  font-weight: var(--fw-700);

  &.invalid {
    color: var(--Light-red);
  }
}

input {
  color: var(--Off-black);
  border: 1px solid var(--Light-grey);
  border-radius: 0.3rem;
  font: inherit;
  font-size: 1rem;
  font-weight: var(--fw-700);
  margin-top: 0.3rem;
  padding: 0.5rem;
  max-width: 100%;
  display: block;
  cursor: pointer;

  &::placeholder {
    color: var(--Smokey-grey);
  }

  &:hover,
  &:focus-visible {
    outline: none;
    border: 1px solid var(--Purple);
  }

  &.invalid {
    border: 1px solid var(--Light-red);
  }
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

main {
  background: var(--Off-white);
  padding: 5em 1em 0;
  min-height: 100vh;
}

.d-none {
  display: none !important;
}

.age-card {
  border-radius: 1em 1em 5em 1em;
  background: var(--White);
  margin-inline: auto;
  padding: 2em 1em 3em;
  min-width: 21em;
  max-width: 30em;

  @media (min-width: 40em) {
    padding: 1.5em 2em 3em;
  }
}

.age-form {
  border-bottom: 1px solid var(--Light-grey);
}

.age-input {
  gap: 1em;
  display: flex;
}

.form-control {
  max-width: 5.5rem;
}

.age-form {
  span {
    color: var(--Light-red);
    font-size: 0.5rem;
    font-style: italic;
    font-weight: var(--fw-700);
    max-width: 100%;
  }

  & > span {
    font-size: 1rem;
    translate: 0 3em;
    display: inline-block;
  }
}

.btn-primary {
  background: var(--Purple);
  border: none;
  border-radius: 100%;
  margin-inline: auto;
  padding: 1em;
  display: block;
  translate: 0 50%;
  cursor: pointer;

  & > img {
    max-width: 2em;
  }

  @media (min-width: 40em) {
    margin: 0 0 0 100%;
    translate: -100% 50%;
  }
}

.age-display {
  margin-top: 3em;
}

.years,
.months,
.days {
  color: var(--Off-black);
  font-size: 2rem;
  font-weight: 900;
  font-style: italic;
  line-height: 1;
  margin-top: 0.25rem;

  & > span {
    color: var(--Purple);
    letter-spacing: 5px;
  }

  @media (min-width: 40em) {
    font-size: 3rem;
  }
}